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percentage of water in human body weight

percentage of water in human body weight

percentage of water in human body weight

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percentage of water in human body weight
percentage of water in human body weight

What is the average percentage of water in the human body?

Most of the human body is water, with an average of roughly 60%. The amount of water in the body changes slightly with age, sex, and hydration levels.

While the average percentage of water in a person’s body is around 60%, the percentage can vary from roughly 45–75%.

For example, babies have a high percentage of water in their bodies, which decreases with age.

Also, fatty tissue contains less water than muscle, so the percentage of water can vary with body type.

Water is essential for health and is necessary for numerous bodily functions. These include:

  • temperature regulation
  • cellular function
  • waste removal

what people can do?

People can maintain the balance of water in their bodies by drinking fluids throughout the day. They may need to drink more water after exercise and in hot weather.

This article will discuss the percentage of water in the human body, why it varies, and why it is important.

Body water percentage chart

The percentage of water in the body varies slightly, depending on factors such as age and sex, but is usually within the 45–75% range.

There is more water in lean muscle than there is in fatty tissue.

Typically, a female body contains a lower percentage of water than a male one. This is due to females having a higher percentage of fat.

This water distribution means that people with a higher percentage of body fat are likely to have a lower percentage of water in their bodies.

The percentage of water in the body changes with age. Babies have a very high percentage of water in their bodies, while older adults have less.

Where is water in the body

Water exists throughout the body. Cells contain 60% of all water in the body, with roughly one-third of the remainder, surrounding the cells.

Some organs contain much more water than others. The brain and kidneys possess the highest percentage of water; the bones and teeth contain the lowest proportion.

Why water is important in the body

Drinking enough water every day is crucial to health and plays a part in almost all body functions. An older reviewTrusted Source states that water is the most important nutrient in the body.

Water is essential in areas such asTrusted Source:

  • protecting the spinal cord and other sensitive tissues
  • removing waste by urination, sweating, and bowel movements
  • regulating temperature
  • lubricating and cushioning joints

How to calculate body water percentage

There is a range of scientific methods to calculate body composition, including the percentage of water.

People can use online calculators to determine the percentage of water in the body.

They can also use the Watson formula to calculate total body water in liters.

percentage of water in human body weight
percentage of water in human body weight

Watson formula for males

2.447 – (0.09156 x age) + (0.1074 x height in centimeters) + (0.3362 x weight in kilograms) = total body weight (TBW) in liters.

Watson formula for females

–2.097 + (0.1069 x height in centimeters) + (0.2466 x weight in kilograms) = total body weight (TBW) in liters.

To get the percentage of body water, people can assume 1 liter equals 1 kilogram and then divide TBW by weight. This can provide a rough estimate of whether a person is in a healthy range for percentage of body weight.

How to maintain a healthy percentage

It is essential to drink enough water to support all functions of the body. Most people get enough fluidsTrusted Source from food and beverages throughout the day. They should always drink more fluids in hot weather or after exercise.

The Centers for Disease Control and Prevention (CDC) also recommendTrusted Source:

  • carrying a water bottle for easy access
  • choosing water instead of sugar-sweetened beverages
  • choosing water when eating a meal out
  • adding a wedge of lemon or lime to water to improve taste

Some tips for older adults specifically include:

  • not waiting until feeling thirst to drink fluids
  • drinking a glass of water before and after exercise
  • taking a sip of water between each bite of food at meals
  • drinking a full glass of water when taking medication

There is no set daily amount of fluid that a person should drink. The amount varies, depending on age, sex, weight, health, physical activity, and the climate where a person lives.

How much water is too much?

Water toxicityTrusted Source happens when there is too much water in the body. This can dilute essential electrolytes in the blood, cause cells to swell, and put pressure on the brain.

Drinking too much water is difficult. There have been cases of water poisoning in people who drank a lot of water in a very short space of time. This may be during endurance sports because of heat stress, or when using recreational drugs that increase thirst.

There is no clear limit for drinking too much water. The kidneys can remove 20–28 liters of water per day, but they cannot excrete more than 0.8 to 1.0 liters per hour. Drinking more than this can be harmful.


A majority of the human body consists of water. The percentage varies with age, sex, and body type but is usually around 60%. A person can maintain the balance of water in the body by taking in enough fluids during the day.

Water is crucial to keep the body working correctly. It is present in the blood, skin, organs, and bones. There is water in every cell of the body, from the brain to the teeth.

Fifteen benefits of drinking water

Keeping hydrated is crucial for health and well-being, but many people do not consume enough fluids each day.

Around 60 percent of the body is made up of water, and around 71 percent of the planet’s surface is covered by water.

Perhaps it is the ubiquitous nature of water that means drinking enough each day is not at the top of many people’s lists of priorities.

percentage of water in human body weight
percentage of water in human body weight

Fast facts on drinking water

Fifteen benefits of drinking water

1. It lubricates the joints

Cartilage, found in joints and the disks of the spine, contains around 80 percent water. Long-term dehydration can reduce the joints’ shock-absorbing ability, leading to joint pain.

2. It forms saliva and mucus

Saliva helps us digest our food and keeps the mouth, nose, and eyes moist. This prevents friction and damage. Drinking water also keeps the mouth clean. Consumed instead of sweetened beverages, it can also reduce tooth decay.

3. It delivers oxygen throughout the body

Blood is more than 90 percent water, and blood carries oxygen to different parts of the body.

4. It boosts skin health and beauty

With dehydration, the skin can become more vulnerable to skin disorders and premature wrinkling.

5. It cushions the brain, spinal cord, and other sensitive tissues

6. It regulates body temperature

7, The digestive system depends on it

8. It flushes body waste

Water is needed in the processes of sweating and removal of urine and feces.

9. It helps maintain blood pressure

A lack of water can cause blood to become thicker, increasing blood pressure.

10. The airways need it

When dehydrated, airways are restricted by the body in an effort to minimize water loss. This can make asthma and allergies worse.

11. It makes minerals and nutrients accessible

These dissolve in water, which makes it possible for them to reach different parts of the body.

12. It prevents kidney damage

The kidneys regulate fluid in the body. Insufficient water can lead to kidney stones and other problems.

13. It boosts performance during exercise

14. Weight loss

Water may also help with weight loss, if it is consumed instead of sweetened juices and sodas. “Preloading” with water before meals can help prevent overeating by creating a sense of fullness.

15. It reduces the chance of a hangover

When partying, unsweetened soda water with ice and lemon alternated with alcoholic drinks can help prevent overconsumption of alcohol.

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